Lately, anytime I start a new task and then quit the application and come back to it, the task does not start running. The Status bar in the Tasks tab says that it's waiting for GPU memory. I have "Use GPU while computer is running" unchecked in prefs. Only way to get it running again seems to be restarting my Macbook (logging out and then back in doesn't do it). Am running 6.12.35 on a late-2008 Core 2 Duo Macbook with Lion 10.7.1. Any ideas? Thanks!
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Thanks for the tips, everyone. Dumping the task that was hanging in Activity Monitor got things going again. Following is part of the contents of Event Log after I added the cc_config file and restarted BOINC Manager:

Thanks, but we're waiting for the log of when the task is hanging again with "Waiting for GPU memory". Do not stop the tasks in Activity Monitor or abort them in BOINC. Just let them run. Or do you mean that the last bit of the log showed the "waiting for GPU memory" bit?
____________Jord

Sorry about that. Apparently I wasn't exactly sure what you were asking me to post. This time I started BOINC and waited for it to hang with the "Waiting to run (waiting for GPU memory)" message in the Status column. What follows is the entire contents of the Event Log from when I started BOINC to when it hung.

Thank you, just whenever you have this problem, post the log, then exit & restart BOINC. we wouldn't want you to stay on hold for too long. I've notified the BOINC developers of your problem, sent them the log. Let's hope they figure what's causing it.
____________Jord

I have been informed that a fix for this problem has been around since the middle of September, but that this one wasn't back-ported into the 6.12 range. It's been put on the to do list and will be included in a next 6.12; release date as yet unknown.
____________Jord

Would this particular issue be at all related to why it seems to take forever for a finished work unit to upload and for BOINC to get a new work unit? Do I need to go back in and quit the debugging process in order for it to upload (and if so, how?), or is it some other issue? Manually updating the project and retrying the upload have no effect. It's been months since uploading/reporting/getting new work unit has worked consistently or reliably. If the network issue is unrelated to the Waiting for GPU Memory issue, just let me know, and I'll post it to a different thread. Thanks!
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Great. I went to 6.12.43 as I could find that one on you link as what looked like the latest. Now all my work units go to waiting on GPU within a minute. I use to only have two Work units with the issue. Bummer. I think I will try and back rev myself.

I moved back to 6.12.41 as indicated above. I still had the issue with waiting on GPU. Looking in the log I had a lot of "if this happens alot, you may have to reset the project" notations. I did that (bummer), and so far I haven't had any problems with the new work units I got assigned. So a little bump in the road, but I seem to be better for now.